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The evolution of a submarine landform record following recent and multiple surges of Tunabreen glacier, Svalbard

Research output: Contribution to journalArticle

  • Anne Elina Flink
  • Riko Noormets
  • Nina Kirchner
  • Douglas I. Benn
  • Adrian Luckman
  • Dr Harold Lovell
This study focuses on the glacial landform record associated with recent surge events of Tunabreen – a calving tidewater glacier in Tempelfjorden, Spitsbergen. Submarine geomorphology and recent terminal fluctuations of Tunabreen's glacier front were studied using high-resolution multibeam-bathymetric data and a range of published and remote-sensing sources, including topographic maps, satellite images and aerial photographs. The retreat moraines in the inner part of Tempelfjorden have been correlated with glacier terminus positions during retreat from the 2004 surge maximum. Glacier surface velocity and ice-front positions derived from high-resolution TerraSAR-X satellite data show ice movements at the glacier front during minor advances of the front in winter when calving is suppressed. This suggests that the moraines have formed annually during quiescent phase winter advances.

Tunabreen has experienced three surges since the Little Ice Age (LIA). This is in contrast with most Svalbard surging glaciers which have long quiescent phases and have typically only undergone one or two surges during this time. The landform record in Tempelfjorden is distinguished from previously studied glacier-surge landsystems by four, well-preserved sets of landform assemblages generated by the LIA advance and three subsequent surges, all of which partly modify earlier landform records. Based on the unique landform record in Tempelfjorden, a new conceptual landsystem model for frequently surging glaciers has been put forward improving our understanding of the dynamics of the surging glaciers and, most importantly, how they can be distinguished from the climatically-controlled glaciers in the geological record.
Original languageEnglish
Pages (from-to)37-50
JournalQuaternary Science Reviews
Volume108
Early online date27 Nov 2014
DOIs
Publication statusPublished - 15 Jan 2015

Documents

  • Flink et al. (2015) (accepted manuscript)

    Rights statement: “NOTICE: this is the author’s version of a work that was accepted for publication in Quaternary Science Reviews. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Quaternary Science Reviews, [VOL 108, (15/01/15)] DOI10.1016/j.quascirev.2014.11.006

    Accepted author manuscript (Post-print), 1.57 MB, PDF document

    Licence: CC BY

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